With Drew and Luca onboard the ISS, Chris continues to work on the ground, but the tools to achieve the mission are still not working. Ken is forced goes rogue and develops a last-minute tool.

The team embark on their first spacewalk. Meanwhile, Chris lands another mission to space. Back with the AMS team in Houston, they grid for the second spacewalk.

Chris ties up loose ends before his launch date. As he flies to Japan, Luca and Drew’s final spacewalk commences. The future of physics in space hangs in the balance. Chris watches the spacewalk from his phone at a Japanese bar.

Luca and Chris reunite in Germany. Chris is then off to Russia where he prepares to launch on the Soyuz Rocket. It’s the only way to travel to space, but that may change if SpaceX can send two astronauts to the ISS.

Chris and Drew overlap for a week before Chris is left to man the station. Bob Behnken and Doug Hurley pilot the SpaceX flight to the ISS. With their arrival, Chris can do his favorite part of the job: spacewalks.